He is the fifth pre-season signing for Roma, who finished second last term and are strengthening under sporting director Monchi's guidance.

"We are extremely happy with the arrival of Cengiz, a player with great technical ability," said Monchi. "We are confident he will quickly adjust to his new surroundings and his quality and talent will be a valuable addition to our squad."

Roma have also brought in the likes of Hector Moreno, Maxime Gonalons and Juan Jesus.